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bug#36633: Scrolling by pixels: visible stretch glyphs overwrite header-
From: |
Keith David Bershatsky |
Subject: |
bug#36633: Scrolling by pixels: visible stretch glyphs overwrite header-line. |
Date: |
Fri, 12 Jul 2019 19:10:44 -0700 |
Step 1: Launch Emacs 26.
Step 2: Evaluate the following code.
(progn
(find-library "simple")
(pixel-scroll-mode 1)
(re-search-forward "\t\t\t\t\t" nil t)
(set-window-start (selected-window) (match-beginning 0))
(setq header-line-format "hello-world")
(setq buffer-display-table (make-display-table))
(aset buffer-display-table
?\t
(vector (make-glyph-code ?\u00BB 'font-lock-warning-face)
(make-glyph-code ?\t 'highlight)))
(setq tab-width 8))
Step 3: Move the mousewheel downward one time; i.e., one ratchet.
Step 4: Observe the visible stretch glyphs overwriting the header-line.
BEHAVIOR EXPECTED: The header-line should not be overwritten by the visible
stretch glyphs that are being scrolled upwards from the row beneath the
header-line.
I am on OSX 10.6.8 and performed this minimal working example with:
GNU Emacs 26.1 (build 1, x86_64-apple-darwin10.8.0, NS appkit-1038.36 Version
10.6.8 (Build 10K549)) of 2018-05-30
- bug#36633: Scrolling by pixels: visible stretch glyphs overwrite header-line.,
Keith David Bershatsky <=
- bug#36633: Scrolling by pixels: visible stretch glyphs overwrite header-line., Eli Zaretskii, 2019/07/13
- bug#36633: Scrolling by pixels: visible stretch glyphs overwrite header-line., Alan Third, 2019/07/14
- bug#36633: Scrolling by pixels: visible stretch glyphs overwrite header-line., Keith David Bershatsky, 2019/07/14
- bug#36633: Scrolling by pixels: visible stretch glyphs overwrite header-line., Keith David Bershatsky, 2019/07/14
- bug#36633: Scrolling by pixels: visible stretch glyphs overwrite header-line., Keith David Bershatsky, 2019/07/17